After she is "reprogrammed" by William and Charlotte Hale, Clementine ( Angela Sarafyan ) adopts a number of body language cues which have come to be indicative of "villain" hosts. These include moving her eyes before turning her head to look at someone. Tessa Thompson and Evan Rachel Wood noted this after the season 2 finale when Dolores is installed into a Hale host body.
The train that arrives at the renovated Westworld is styled after the "Mercury" Streamliner trains operated in the Midwest United States by the New York Central Railroad in the 1930's. They were renowned for their smooth lines and Art Deco styling that defined the period.
In the underpart of the opera house, the glass on the doors are shaped like an upside down Tower.